Circular tubes are widely used in daily life and manufacture under bending load. The structural parameters of a circular tube, such as its wall thickness, number shapes ribs, supporting flanges, closely related to the tube’s rigidity. In this study, tube with eight ribs flange was optimized, order obtain lowest weight, through comprehensive optimization. We obtained optimal influence on weight....

Concrete-filled double skin structural members, comprising of two metal tubes and concrete infill between them, have been gaining popularity in engineering because their high strength, large stiffness, good ductility easy maintenance. The use aluminium these members can further enhance performance, as alloy offers lightweight corrosion resistance. This study presents experimental numerical inve...

Crystalline chitosan was successfully prepared from crab tendons with aligned chitin molecules. Chitosan obtained preserved the tube structure with a suitable size for nerve conduits (t-chitosan tube). The chitosan tubes were compounded with hydroxy apatite (HAp) using an alternate soaking method (t-chitosan/HAp tube) to enhance the strength of the tube walls. HAp crystals formed in the walls o...

A weak square in a binary word is a pair of adjacent non-empty blocks of the same length, having the same number of 1s. A weak circular square is a weak square which is possibly wrapped around the word: the tail protruding from the right end of the word reappears at the left end. Two weak circular squares are equivalent if they have the same length and contain the same number of ones. We prove ...

Thin-walled tube bending is still to be considered a new and advanced technique. The process has been adopted into several industries such as aero and automotive. This process may produce a wrinkling, bulking and tearing phenomenon if the process parameters are inappropriate, especially for tubes with large diameter and thin wall thickness. Push bending process is one of the methods used for be...